Nehemiah 7:63-64

63There were also some priests from the clans of Hobaiah, Hakkoz and Barzillai. (Barzillai was a man who had married a daughter of Barzillai, who came from Gilead. So he took Barzillai's name for himself.)

64These people could not find any lists to show who their ancestors were. Because of this, they could not serve God as priests.